97- 



2. Pteria [jElectroma) ovata (Ouoy & Gaimard). 



1785. Mytilus ineleagridis, etc. Chemnitz, Conch. Cab., VIII, p. 143, pi. LXXXI, fig. 726. 



1788. Mytilus ineleagridis Schrôter, Conch. Cab. Namen Reg., p. ']'j. 



1791. Bruguière, Encyclopéd. Méthod., pi. CLXXVII, fig. 5. 



18 19. Avicula papilionacea, var. b, Lamarck, Anim. sans Vertèb., VI, p. 149. 



1834. Meleagritia ovata and M. tongana Quoy & Gaimard, Voy. "Astrolabe". III, pp. 459, 460, 



pi. LXXVII, figs. 12—15. 

 1869. Avicula ineleagridis Dunker, Cat. Mus. Godeiîfroy, IV, p. 115. 



1871. Avicula ineleagris (sic), von Martens & Langkavel, Donum Bismarckianum, p. 63. 



1872. Avicula ineleagridis Dunker in Martini Chemn. Conch. -Cab. (N. F.), VII (3), Avicula, 



p. 57, pi. XIX, figs. 5, 6. 

 1890. Avicula ineleagridis Paetel, Cat. Conch., Samm., III, p. 205. 

 1906. Pteria ineleagridis Owston, Japan. Loochooan Shells, p. 34. 

 191 1. Avicula [Electroina) ineleagridis Pelseneer, "Siboga" Lamellibranches (Anat.), p. 24, 



pi. IX, figs. 3, 4. 



So far as I hâve been able to find from a careful scrutiny of the literature, the Chemnitzian 

 name ineleagridis was not adopted by any of the binomial writers till after the name ovata of 

 Ouoy & Gaimard. Unfortunately this and the aUied species are not well represented in any of 

 the collections that I hâve examined, but from a careful examination of the material in the 

 British Muséum (Nat. Hist.), London, I am of opinion that Reeve's Avicula smaragdina ^) from 

 Moluccos (?) is also a synonym of this species. The single shell, which I assign to P. [E.) ovaia^ 

 agrées with the description and figures of the Chemnitzian species ineleagridis \x\ the "Conch. -Cab.". 



Distribution : — The records of P. [E.) ovata are very scanty, but it appears to be 

 widely distributed in the Indo-Pacific. 



The "Siboga" Expédition collected a single shell at Pulu Kabala-dua, Bornéo Bank 

 (St. 79 b). This shell is 32 mm. long, almost transluscent, of a whitish green colour, with a 

 number of darker rays radiating from the umbo to the posterior margin ; the rays further hâve 

 a large number of small black dots arranged irregularly along the middle line. 



Genus Pinctada Rôding. 



1756. Margaritifera Browne, Nat. Hist. Jamaica, p. 412. 



1797. Margaritifera (ex parte), Humphrey, Mus. Calonnianum, p. 44. 



1798. Pinctada (ex parte) Roding, Mus. Boltenianum, p. 166. 

 1807. Unioniîun Link, Beschreib. Nat. Samm. Univ. Rostock, p. 155. 



181 1. Margaritophora Megerle, Mag. Ges. Naturf. Freunde, Berlin, V, p. 66. 



18 14. Margarita Leach, Zool. Miscell., I, p. 107. 



1817. Perlamater Schumacher, Essai Nouv. Syst., p. 107. 



18 19. Meleagrina Lamarck, Anim. sans Vertèb., VI, p. 150. 



1857. Margaritifera Adams, H. & A., Gen. Rec. MolL, II, p. 525. 



1857. Avicula (ex parte) Reeve, Conch. Icon., X, Avicula, pi. i (explanation). 



1886. Avicula^ subgen. Meleagrina Fischer, P., Man. ConchylioL, p. 952. 



1901. Margaritifera Jameson, Proc. Zool. Soc. London, p. 372. 



1915. Pinctada Iredale, Proc. Malacol. Soc. London, XI, p. 305. 



The generic name of the Mother-of-Pearl Oysters has undergone several changes, but 



i) Reeve, L. — Conch. Icon., X, Avicula^ pi. XII, fig. 45 (1857). 



SIBOGA-EXPEDITIE LUI C. 13 



